package com.example.demo.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;


//打印日志
@Controller
public class UserController {

    //得到日志对象
    private final static Logger log = LoggerFactory.getLogger(UserController.class);  //设置当前类的类型

    @ResponseBody
    @RequestMapping("/sayhi")
    public String sayHi() {
        //利用log对象打印日志
        log.trace("我是trace");
        log.debug("我是debug");
        log.info("我是info");
        log.warn("我是warn");
        log.error("我是error");
        return "<h1>Hi,Spring MVC.</h1>";
    }
}
